WO1999026012A1 - Pipe attachment - Google Patents

Pipe attachment Download PDF

Info

Publication number
WO1999026012A1
WO1999026012A1 PCT/SE1998/002029 SE9802029W WO9926012A1 WO 1999026012 A1 WO1999026012 A1 WO 1999026012A1 SE 9802029 W SE9802029 W SE 9802029W WO 9926012 A1 WO9926012 A1 WO 9926012A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
bend
diameter
wall
stand
Prior art date
Application number
PCT/SE1998/002029
Other languages
French (fr)
Inventor
Rolf Ekholm
Ulf Jansson
Original Assignee
Kvaerner Pulping Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kvaerner Pulping Ab filed Critical Kvaerner Pulping Ab
Priority to DE69822864T priority Critical patent/DE69822864D1/en
Priority to AT98956051T priority patent/ATE246780T1/en
Priority to EP98956051A priority patent/EP1029194B8/en
Publication of WO1999026012A1 publication Critical patent/WO1999026012A1/en
Priority to US09/554,285 priority patent/US6418963B1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
    • D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
    • D21D5/28—Tanks for storing or agitating pulp
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85938—Non-valved flow dividers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/85978—With pump

Definitions

  • the present invention relates to a pipe attachment, for example to a pulp pump, which attachment consists of a pipe bend and, joined tightly to the latter, a stand pipe.
  • the wall of the stand pipe preferably coincides with a wall portion of the pipe bend.
  • the wall of the stand pipe preferably coincides with the internal curve wall of the pipe bend.
  • the wall of the stand pipe can coincide with the external curve wall of the pipe bend or even the side walls of the pipe bend. It is essential that despite different diameters, the combination has a linearly coincident wall portion.
  • the diameter of the stand pipe can, for example, be 1.5 times the diameter of the pipe ben ⁇ .
  • Figure 2 shows a cross-section along the line II-II m Figure 1.
  • Figure 3 shows a preferred embodiment of the invention mounted m conjunction with the pulp tower, and,
  • Figure 4 shows an alternative embodiment for mounting it to the pulp tower.
  • the embodiment of the invention shown m the drawing consists of a stand pipe 2 with diareter 1.5 x D.
  • This stand pipe 2 is joined tightly to an underlying pipe bend 1 with diameter D.
  • the free end of the pipe bend 1 is provided with an attachment flange.
  • the stand pipe 2 and the pipe bend _ nave been joined together so that the wall of the stand pipe 2 coincides linearly with the internal curve wall of the pipe bend 1.
  • a contiguous wall portion _s thereby obtained m the front wall of the combmatior.
  • That end of the stand pipe 2 which has been joined to the pipe bend 1 has been provided with a bottom equipped with a hole, corresponding to the diameter of the pipe oend, above the pipe bend for attachment to the ben ⁇ .
  • the advantage of the stand pipe having a greater diameter wnile retaining the same neight is that a greater buffer capacity is obtained. This increased capacity affords a considerably more uniform discharge.
  • the time between the maximum level and minimum level m the stand pipe increases in proportion to the difference m diameter.
  • _f in the arrangement according to the drawing, the diameter D of the bend is 800 mm, the diameter of the stand pipe is 1200 mm.
  • the buffer capacity is thus 2.25 times greater than it would be if the diameter of the stand pipe were also to be 800 mm.
  • the front wall portion of the stand pipe coincides with the internal curve wall of the pipe bend, and the two pipe portions are therefore not joined together coaxially.
  • the even internal wall portion which is thus obtained guides the flow of the pulp and prevents the occurrence of arching.
  • the same control is also obtained if the two pipe portions included in the combination are joined together so that the wall of the stand pipe coincides with the external curve wall of the pipe bend or any of its side walls.
  • FIG 3 there is shown a preferred embodiment of the invention in conjunction with pulp storage tower 3.
  • the pulp storage tower 3 is shown to be of a common design, having a cupped gable at the bottom 3.
  • a drop leg 2 is attached thereto by welding.
  • the drop leg is not mounted centrally in relation to the pulp storage tower 3, but has its centre axes 4 positioned off-centred in relation to the central axis 5 of the pulp storage tower 3.
  • a pump 7 is mounted at the vertical end 1A of the bow pipe 1.
  • FIG 4 there is shown an alternative embodiment where pulp tower 3 is arranged with an inclined bottom " 9.
  • the inclined bottom 9 is made by means of using a concrete base portion 10.
  • the pulp tower and also the bottom portion of the pulp tower has a circular cross- sectional configuration.
  • a through hole 11 At the lower end of the inclined bottom 9 there is arranged a through hole 11 having a flange 12 arranged at its lower end.
  • the flange 12 is bolted to the upper flange 13 of the drop leg 2 and bow pipe unit 1 in accordance with the above.
  • a pump 9 is mounted in the same manner as shown in Figure 3.
  • the pulp tower 3 rests on at least one concrete pillar 14 positioned below the highest part of the inclined bottom of the concrete portion.
  • the drop leg and bow pipe 2, 1 does form a part of the support for the pulp tower, by means of the lower flange 1 A being fixedly attached to the ground.
  • the invention is not limited by what is shown but can be varied within the scope of the claims.
  • the skilled man realizes that in place of welding attachment means like bolts or any similar means may be used.
  • the skilled man realizes that other designs than cupped gables and also other materials than concrete for a bottom portion may be used in connection with the pulp tower for achieving the positive effect in relation to avoiding bridges.
  • towers having a cross-sectional configuration, which is different from the circular configuration, (e.g. rectangular, octagonal) can be used in connection with the invention.
  • the inclined bottom may be arranged with a lining which reduces the friction of the bottom portion of the tower.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Joints Allowing Movement (AREA)
  • Supports For Pipes And Cables (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Non-Disconnectible Joints And Screw-Threaded Joints (AREA)
  • Mechanical Coupling Of Light Guides (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

This invention relates to a pipe attachment, for example to a pulp pump, which attachment consists of a pipe bend (1) and, joined tightly to the latter, a stand pipe (2), wherein the diameter of the stand pipe (2) is greater than that of the pipe bend (1).

Description

Pipe attachment
Field of invention
The present invention relates to a pipe attachment, for example to a pulp pump, which attachment consists of a pipe bend and, joined tightly to the latter, a stand pipe.
Technical field and new solution
In order to obtain a uniform and stable discharge of pulp through a combination of stand pipe and pipe bend, it is important to ensure that the volume capacity of the said combination is sufficient. Of course, the rest of the structure must also be such that the flow and discharge of the pulp can proceed without αisturbances, such as, for example, arching of the pulp. According to the present invention, a smoother discharge is obtained by means of the fact that the diameter of the stand pipe is greater than that cf the pipe bend.
The wall of the stand pipe preferably coincides with a wall portion of the pipe bend. The wall of the stand pipe preferably coincides with the internal curve wall of the pipe bend. Alternatively, the wall of the stand pipe can coincide with the external curve wall of the pipe bend or even the side walls of the pipe bend. It is essential that despite different diameters, the combination has a linearly coincident wall portion.
The diameter of the stand pipe can, for example, be 1.5 times the diameter of the pipe benα.
Brief description of the drawings
The invention is described m greater detail with reference to the attached drawings m which Figure 1 shows a side view of the invention, and
Figure 2 shows a cross-section along the line II-II m Figure 1. Figure 3 shows a preferred embodiment of the invention mounted m conjunction with the pulp tower, and,
Figure 4 shows an alternative embodiment for mounting it to the pulp tower.
Detailed description of the invention
The embodiment of the invention shown m the drawing consists of a stand pipe 2 with diareter 1.5 x D. This stand pipe 2 is joined tightly to an underlying pipe bend 1 with diameter D. The free end of the pipe bend 1 is provided with an attachment flange.
The stand pipe 2 and the pipe bend _ nave been joined together so that the wall of the stand pipe 2 coincides linearly with the internal curve wall of the pipe bend 1. A contiguous wall portion _s thereby obtained m the front wall of the combmatior. That end of the stand pipe 2 which has been joined to the pipe bend 1 has been provided with a bottom equipped with a hole, corresponding to the diameter of the pipe oend, above the pipe bend for attachment to the benα.
The advantage of the stand pipe having a greater diameter wnile retaining the same neight is that a greater buffer capacity is obtained. This increased capacity affords a considerably more uniform discharge. The time between the maximum level and minimum level m the stand pipe increases in proportion to the difference m diameter. For example, _f, in the arrangement according to the drawing, the diameter D of the bend is 800 mm, the diameter of the stand pipe is 1200 mm. The buffer capacity is thus 2.25 times greater than it would be if the diameter of the stand pipe were also to be 800 mm.
As can be seen from the drawing, the front wall portion of the stand pipe coincides with the internal curve wall of the pipe bend, and the two pipe portions are therefore not joined together coaxially. The even internal wall portion which is thus obtained guides the flow of the pulp and prevents the occurrence of arching. The same control is also obtained if the two pipe portions included in the combination are joined together so that the wall of the stand pipe coincides with the external curve wall of the pipe bend or any of its side walls.
In Figure 3 there is shown a preferred embodiment of the invention in conjunction with pulp storage tower 3. The pulp storage tower 3 is shown to be of a common design, having a cupped gable at the bottom 3. At the cupped gable 3A a drop leg 2 is attached thereto by welding. As can be seen the drop leg is not mounted centrally in relation to the pulp storage tower 3, but has its centre axes 4 positioned off-centred in relation to the central axis 5 of the pulp storage tower 3. At the bottom of the drop leg 2 there is attached a bow pipe 1 as shown in Figure 1. A pump 7 is mounted at the vertical end 1A of the bow pipe 1. By mounting the drop leg 2 asymmetrically in relation to the pulp tower further positive effects are gained for avoiding bridges to be formed within the pulp tower, since its asymmetrically design reduces the risk of creating such bridges. Accordingly the design shown in Figure 3 does provide for a more reliable design for pumping of pulp from the pulp storage tower 3 then prior art designs.
In Figure 4 there is shown an alternative embodiment where pulp tower 3 is arranged with an inclined bottom" 9. The inclined bottom 9 is made by means of using a concrete base portion 10. The pulp tower and also the bottom portion of the pulp tower has a circular cross- sectional configuration. At the lower end of the inclined bottom 9 there is arranged a through hole 11 having a flange 12 arranged at its lower end. The flange 12 is bolted to the upper flange 13 of the drop leg 2 and bow pipe unit 1 in accordance with the above. A pump 9 is mounted in the same manner as shown in Figure 3. The pulp tower 3 rests on at least one concrete pillar 14 positioned below the highest part of the inclined bottom of the concrete portion. Also the drop leg and bow pipe 2, 1 does form a part of the support for the pulp tower, by means of the lower flange 1 A being fixedly attached to the ground.
The invention is not limited by what is shown but can be varied within the scope of the claims. The skilled man realizes that in place of welding attachment means like bolts or any similar means may be used. Furthermore the skilled man realizes that other designs than cupped gables and also other materials than concrete for a bottom portion may be used in connection with the pulp tower for achieving the positive effect in relation to avoiding bridges. Also towers having a cross-sectional configuration, which is different from the circular configuration, (e.g. rectangular, octagonal) can be used in connection with the invention. In a preferred embodiment the inclined bottom may be arranged with a lining which reduces the friction of the bottom portion of the tower.

Claims

Claims
1. Pipe attachment, for example to a pulp pump, which attachment consists of a pipe bend (1) and, joined tightly to the latter, a stand pipe (2), characterized m that the diameter of the stand pipe (2) is greater than that of the pipe bend (1) .
2. Pipe attachment according to Claim 1, characterized m that the wall of the stand pipe (2) coincides with a wall portion of the pipe bend (1) .
3. Pipe attachment according to Claim 2, characterized m that the wall of the stand pipe (2) coincides with the internal curve wall of the pipe bend (1) .
4. Pipe attachment according to Claim 2, characterized m that the wall of the stand pipe (2) coincides with the external curve wall of the pipe bend (1) •
5. Pipe attachment according to Claim 1 or 2, characterized m that the diameter of the stand pipe (2) is 1.5 times the diameter of the pipe bend.
6. Pipe connection according to Claim 1, characterized m that it is arranged at the bottom portion of a pulp tower (3) wherein the centre line of the drop leg (2) is off-centred m relation to the centre line (5) of the pulp tower.
7. Pipe connection according to Claim 6, characterized m that the diameter of the pulp tower (3) is larger at least two times, than the diameter of the drop leg (2 ) . AMENDED CLAIMS
[received by the International Bureau on 6 April 1999 (06.04.99); original claims 1-7 replaced by amended claims 1-6(1 page)]
1. Pipe attachment for discharging pulp to a pump, for example a pulp pump, which attachment consists of a stand pipe (2) and, joined tightly to the latter, a pipe bend (1) wherein the stand pipe is located above and attached to the pipe bend and with the pump mounted at the end of the pipe bend, c h a r a c t e r i z e d i n that the diameter of the stand pipe (2) is greater than that of the pipe bend (1) and in that a wall portion of the stand pipe (2) coincides with a wall portion of the pipe bend (1).
2. Pipe attachment according to Claim 1, c h a r a c t e r i z e d i n that the wall of the stand pipe (2) coincides with the internal curve wall of the pipe bend (1) .
3. Pipe attachment according to Claim 1, c h a r a c t e r i z e d i n that the wall of the stand pipe (2) coincides with the external curve wall of the pipe bend (1) .
4. Pipe attachment according to Claim 1, c h a r a c t e r i z e d i n that the diameter cf the stand pipe (2) is 1.5 times the diameter of the pipe bend.
5. Pipe connection according to Claim 1, c h a r a c t e r i z e d i n that it is arranged at the bottom portion of a pulp tower (3) wherein the centre line of the drop leg (2) is off-centred in relation to the centre line C5) cf the pulp tower.
6. Pipe connection according to Claim 5, c h a r a c t e r i z e d i n that the diameter cf the pulp tower (3) is larger at least two times, than the diameter of the drop leg (2) .
PCT/SE1998/002029 1997-11-14 1998-11-11 Pipe attachment WO1999026012A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
DE69822864T DE69822864D1 (en) 1997-11-14 1998-11-11 PIPE CONNECTION
AT98956051T ATE246780T1 (en) 1997-11-14 1998-11-11 PIPE CONNECTION
EP98956051A EP1029194B8 (en) 1997-11-14 1998-11-11 Pipe attachment
US09/554,285 US6418963B1 (en) 1997-11-14 1999-07-21 Pipe attachment

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI970501U FI3344U1 (en) 1997-11-14 1997-11-14 The pipe joint
FIU970501 1997-11-14

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/554,285 Continuation US6418963B1 (en) 1997-11-14 1999-07-21 Pipe attachment

Publications (1)

Publication Number Publication Date
WO1999026012A1 true WO1999026012A1 (en) 1999-05-27

Family

ID=8548083

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1998/002029 WO1999026012A1 (en) 1997-11-14 1998-11-11 Pipe attachment

Country Status (6)

Country Link
US (1) US6418963B1 (en)
EP (1) EP1029194B8 (en)
AT (1) ATE246780T1 (en)
DE (1) DE69822864D1 (en)
FI (1) FI3344U1 (en)
WO (1) WO1999026012A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1696207A (en) * 1925-03-13 1928-12-25 Larkin David Pipe fitting
GB524136A (en) * 1938-01-21 1940-07-30 Bayerische Motoren Werke Ag Device for connecting pipe lines
US2547567A (en) * 1949-10-12 1951-04-03 Marian L Collison Soil pipe reducer
FR2631682A3 (en) * 1988-05-20 1989-11-24 Sifurbo Snc Assandri Denti Inspectable built-in siphon
US5201553A (en) * 1992-10-09 1993-04-13 Grisham William T Pipe connector for washing machine drainage
WO1997039181A1 (en) * 1996-04-18 1997-10-23 Ahlström Pumput Oy Method and apparatus for filling a pulp tower

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2990710A (en) * 1958-10-13 1961-07-04 Improved Machinery Inc Pulp bleaching apparatus
US4043049A (en) * 1974-03-22 1977-08-23 Hedstroem Bengt Olof Arvid Process and apparatus for flash drying fluffed cellulose pulp
SE452345B (en) * 1984-04-02 1987-11-23 Kamyr Ab DEVICE FOR THE DISTRIBUTION OF SUSPENSION BY ITS INCORPORATION IN TREATMENT
US4825906A (en) * 1988-06-06 1989-05-02 Hartman Thomas A Angle pattern control valve

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1696207A (en) * 1925-03-13 1928-12-25 Larkin David Pipe fitting
GB524136A (en) * 1938-01-21 1940-07-30 Bayerische Motoren Werke Ag Device for connecting pipe lines
US2547567A (en) * 1949-10-12 1951-04-03 Marian L Collison Soil pipe reducer
FR2631682A3 (en) * 1988-05-20 1989-11-24 Sifurbo Snc Assandri Denti Inspectable built-in siphon
US5201553A (en) * 1992-10-09 1993-04-13 Grisham William T Pipe connector for washing machine drainage
WO1997039181A1 (en) * 1996-04-18 1997-10-23 Ahlström Pumput Oy Method and apparatus for filling a pulp tower

Also Published As

Publication number Publication date
EP1029194B1 (en) 2003-08-06
EP1029194A1 (en) 2000-08-23
FI3344U1 (en) 1998-03-31
DE69822864D1 (en) 2004-05-06
EP1029194B8 (en) 2003-12-10
FIU970501U0 (en) 1997-11-14
US6418963B1 (en) 2002-07-16
ATE246780T1 (en) 2003-08-15

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